明洞洞门施工方案方法及措施

tofindsolutions.Especiallyvaluableis,thesetwomissionstookthecityinBeijing,theconsiderableworkinblue,fromyinglaisongwang,provideservicestoinvitebusinessmenandformajorprojects,micromanaging,hands-on,realofficesfullservice,fullservicerole.HotelinPingliang,PingliangbuildingandprintingBrushfactoryservicequalityandservicelevelshavealsobeenfurtherenhanced.Second,creativelyworktowardsfundingprojectsontoanewstage.TheBeijingliaisonofficeLANfromsimplesecurefunding,andtheshifttoamoredirectlyinvolvedintheproject,fromthesmallprojectstolargeprojectstointroducechange,strengtheningprojectwork.LiaisonOfficeinBeijing,alwaysputthereportconvergenceandimplementation,asreportedtonationalconstructionprojects,Iworkatoppriority,taketheinitiativetostrengthencontactswithnationalministriesandprovincialauthoritiesoncontactand,fromtoptobottomconvergenceprojectsinadvance,timelyfeedbackonthecityandtheCounty(district).LiaisonOfficeinBeijingthisyear,andcooperatewith,ordirectlywithitem8oftheinterfaceimplementedonthenational,provincial,forStateinvestmentofnearly20millionYuan.TheblueOfficecloselyaroundthecity'sfourpillarindustries,largeprojectsandmorematureprojects,brandfocusanddirectionoftheprojectasaninvestment.Graspthe某隧道明洞开挖施工方案、方法及措施第一节工程概况一、设计概况某隧道为双线黄土隧道，起讫里程DK349+776~DK350+615，全长839m,除出口163米位于直线段外，其余隧道洞身均位于R-12000m的曲线上，隧道纵坡为3.5‰的下坡。我部负责施工隧道出口段，出口段明洞里程为DK350+584~615,全长31m.本次施工明洞开挖，临时边仰坡防护和明暗交界处大管棚。二、工程特点本隧道地质条件单一，围岩软弱，全部位于砂质黄土中除局部夹层有古土壤外，没有复杂的地质结构与构造，其地质特点决定了在施工过程中主要的地质灾害表现形式为围岩失稳、坍塌。黄土台塬周边冲沟内无常年流水，隧道无地下水，但在施工中局部段落可能遇到少量渗水。三、水、电、路及场地生产、生活用水利用租井取水；生产、生活用电由局项目部提供高压电源、变压器，用低压线路接至各施工点；主洞进洞道路通过利用原机耕道拓宽后进入；洞口段路基附近场地开阔，地势较平坦，可布置临时设施。施工场地布详见附图。第二节总体施工方案某隧道将按新奥法原理组织施工，始终坚持“管超前、禁爆破、短进尺、强支护、早成环、勤量测、紧衬砌”的原则。拟订明洞开挖施工方案如下：一、施工工期为30天。二、明洞开挖采用挖掘机开挖，大吨位汽车运渣，人工配合修整边坡。三、对洞门墙基的湿陷性地层采用三七灰土换填，基底换填至卵石土与新黄土地层交界处。换填处理完后进行检测，满足设计标准后，方可进行下道工序的施工。四、锚喷网坡面防护边开挖边防护，锚杆采用煤电钻施工，人工挂钢筋网，小型强制式搅拌机拌制混凝土，SSP型湿喷机喷射。五、超前管棚采用潜孔钻机施作，采用ф108管棚，UBJ型注浆泵注浆。六、洞内如出现水聚集，设置排水沟自然排水第三节施工组织一、劳动力安排tofindsolutions.Especiallyvaluableis,thesetwomissionstookthecityinBeijing,theconsiderableworkinblue,fromyinglaisongwang,provideservicestoinvitebusinessmenandformajorprojects,micromanaging,hands-on,realofficesfullservice,fullservicerole.HotelinPingliang,PingliangbuildingandprintingBrushfactoryservicequalityandservicelevelshavealsobeenfurtherenhanced.Second,creativelyworktowardsfundingprojectsontoanewstage.TheBeijingliaisonofficeLANfromsimplesecurefunding,andtheshifttoamoredirectlyinvolvedintheproject,fromthesmallprojectstolargeprojectstointroducechange,strengtheningprojectwork.LiaisonOfficeinBeijing,alwaysputthereportconvergenceandimplementation,asreportedtonationalconstructionprojects,Iworkatoppriority,taketheinitiativetostrengthencontactswithnationalministriesandprovincialauthoritiesoncontactand,fromtoptobottomconvergenceprojectsinadvance,timelyfeedbackonthecityandtheCounty(district).LiaisonOfficeinBeijingthisyear,andcooperatewith,ordirectlywithitem8oftheinterfaceimplementedonthenational,provincial,forStateinvestmentofnearly20millionYuan.TheblueOfficecloselyaroundthecity'sfourpillarindustries,largeprojectsandmorematureprojects,brandfocusanddirectionoftheprojectasaninvestment.Graspthe二、施工进度及工期安排1、明洞开挖：2005年10月21至2005年11月20日。2、明洞边坡锚喷防护：2005年10月23至2005年11月22日。3、明暗交界处大管棚超前支护：2005年10月28至2005年11月18日。详见施工进度计划横道图三、施工机械设备安排主要机具设备1挖掘机隧道2装载机隧道3自卸车隧道4电焊机隧道5切断机隧道6湿喷机隧道7稳定土拌合机隧道8砼运输车隧道9混凝土搅拌机隧道10空压机隧道11潜孔钻隧道12注浆泵隧道四、施工辅助生产设施布置1、隧道出口进场便道可从拟建线路里程DK351+043处，卫峪乡间公路与拟建线路交叉位置，沿等高线从线路前进方向侧经隧道出口弃渣场边缘引致隧道出口位置，长度约800米。2、高压供风系统布置：由于QQ群共享某隧道是黄土隧道，施工中不采用爆破，高压风主要用于锚杆以及喷射混凝土施工。根据用风量计算，在洞口右侧5米处修建空压机房，施工队伍施工任务土方开挖组运输组喷锚组大管棚施工组机械保障组合计（人数）隧道二队隧道出口明洞段5人18人20人10人6人59人tofindsolutions.Especiallyvaluableis,thesetwomissionstookthecityinBeijing,theconsiderableworkinblue,fromyinglaisongwang,provideservicestoinvitebusinessmenandformajorprojects,micromanaging,hands-on,realofficesfullservice,fullservicerole.HotelinPingliang,PingliangbuildingandprintingBrushfactoryservicequalityandservicelevelshavealsobeenfurtherenhanced.Second,creativelyworktowardsfundingprojectsontoanewstage.TheBeijingliaisonofficeLANfromsimplesecurefunding,andtheshifttoamoredirectlyinvolvedintheproject,fromthesmallprojectstolargeprojectstointroducechange,strengtheningprojectwork.LiaisonOfficeinBeijing,alwaysputthereportconvergenceandimplementation,asreportedtonationalconstructionprojects,Iworkatoppriority,taketheinitiativetostrengthencontactswithnationalministriesandprovincialauthoritiesoncontactand,fromtoptobottomconvergenceprojectsinadvance,timelyfeedbackonthecityandtheCounty(district).LiaisonOfficeinBeijingthisyear,andcooperatewith,ordirectlywithitem8oftheinterfaceimplementedonthenational,provincial,forStateinvestmentofnearly20millionYuan.TheblueOfficecloselyaroundthecity'sfourpillarindustries,largeprojectsandmorematureprojects,brandfocusanddirectionoftheprojectasaninvestment.Graspthe配备2台20m3/min电动空压机为隧道供风，高压风管用Ф150的无缝钢管，管道连接用法兰盘和螺栓连接。3、高压供水系统布置：在出口洞顶山坡上偏离隧道中线至少80米外的山坡上设置一座80m3的高位水池，下水管路采用Ф80钢管引入洞内。4、电力供应系统布置：根据洞内施工机械用电量的计算，拟在隧道出口安装一台500KVA变压器，从隧道出口附近的高压电网接引至变压器，设立配电房向洞内